The fact that Jeph Loeb and Joe Quesada have pretty limited influence on Marvel Studios allows me to have the measure of faith you lack.

That all said, MS won't be able to touch SM unless a bankrupt Sony sells the rights or Disney buys Sony outright.

Sadly we may never see Spiderman fight along side the Avengers, They had a chance to put Oscorp building in the New York Skyline during the Avengers and did not do so.

Sony is going to try to Milk Spiderman for all they can and then when it is all used up like the Raimi Movies, they will reboot him again just like Warner Brothers is doing to Superman.

You would think with the amount of money Marvel Studios is making on each film, Worldwide Boxoffice for IM3 is now north of a billion dollars, they could but together a package to Buy back Spiderman at least in time for a cameo in Avengers 2 and a New Film produced by Marvel Studios.....but it does not look likey.